668820091034 has 8 divisors (see below), whose sum is σ = 1003236775860. Its totient is φ = 334407832416.

The previous prime is 668820091033. The next prime is 668820091081. The reversal of 668820091034 is 430190028866.

It can be written as a sum of positive squares in 2 ways, for example, as 656500201009 + 12319890025 = 810247^2 + 110995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 668820091034.

It is not an unprimeable number, because it can be changed into a prime (668820091031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698729 + ... + 1351244.

Almost surely, 2^668820091034 is an apocalyptic number.

668820091034 is a deficient number, since it is larger than the sum of its proper divisors (334416684826).

668820091034 is a wasteful number, since it uses less digits than its factorization.

668820091034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213104.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 668820091034 in words is "six hundred sixty-eight billion, eight hundred twenty million, ninety-one thousand, thirty-four".